Microwave Sensors_Lecture 1
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Questions and Answers

What is the nominal ground range resolution of the RADARSAT 1 SAR sensor?

  • 23 m (correct)
  • 10 m
  • 100 m
  • 5.7 m

    • Which of the following orbital SAR systems has a repeat cycle of 17 days?

  • RADARSAT 1
  • ERS-2 (correct)
  • ALOS PALSAR
  • Envisat 1

    • What is the swath width of the SAOCOM SAR sensor?

  • 35 km (correct)
  • 30 km
  • 10 km
  • 100 km

    • Which of the following polarization modes is NOT available on the RADARSAT 2 SAR sensor?

    <p>LH</p> Signup and view all the answers

    What is the wavelength of the Envisat 1 ASAR SAR sensor?

    <p>5.6 cm</p> Signup and view all the answers

    What is a major advantage of radar systems in terms of illumination?

    <p>They are a controllable source of illumination</p> Signup and view all the answers

    What is the primary factor that affects the radar cross-section of a target?

    <p>All of the above</p> Signup and view all the answers

    What is the typical resolution of images produced by radar systems?

    <p>3-10 m</p> Signup and view all the answers

    What is the primary function of an antenna in a radar system?

    <p>To switch between transmission and reception of signals</p> Signup and view all the answers

    What is the term for the distance between the radar antenna and the target?

    <p>Range to target</p> Signup and view all the answers

    What is the primary advantage of a spaceborne SAR compared to an airborne SAR with a similar swath width?

    <p>More uniform illumination geometry over the whole swath</p> Signup and view all the answers

    What is the purpose of sampling the return magnitude and phase in radar operation?

    <p>To provide a coherent radar operation</p> Signup and view all the answers

    What is represented by the bright tones in a radar image?

    <p>High backscatter values</p> Signup and view all the answers

    What is the primary information provided by radar images?

    <p>Physical properties of the target</p> Signup and view all the answers

    What is the format of the raw data file in a radar system?

    <p>A two-dimensional array of complex values</p> Signup and view all the answers

    What is the typical revisit period for a spaceborne SAR system?

    <p>3-35 days</p> Signup and view all the answers

    What correction is necessary during processing of spaceborne SAR data due to the Earth's shape?

    <p>Correction for earth curvature</p> Signup and view all the answers

    What is the name of the first civilian spaceborne SAR system launched in 1978?

    <p>SEASAT</p> Signup and view all the answers

    Which polarization mode is used by the SEASAT SAR system?

    <p>HH</p> Signup and view all the answers

    What is the wavelength of the radar signal used by the Almaz SAR system?

    <p>10 cm</p> Signup and view all the answers

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